- Aegis Sciences Corporation
 - Makers of the Zero Tolerance Drug Testing (ZTDT) products and services for individuals, organisations, and businesses. - American Lab Service
- Certified SAMHSA/DOT/HHS laboratory that supplies chain of custody forms, collection cups, lab packs, and pre-paid airway bills to support workplace drug testing programmes.
- Columbia Laboratory Services
- Full-service provider for drug, alcohol, and paternity testing equipment and supplies.
- Drug Detection Services, Inc.
- Confidential substance abuse testing for corporate, legal, or personal applications.
- Friends Medical Laboratory, Inc.
- Hair Confirm
- Offers hair follicle drug testing kits and laboratory analysis for screening drug metabolites in hair strands.
- High Standards Products Corporation
- Reference standards and test kit for drugs of abuse testing, clinical toxicology, and therapeutic drug monitoring.
- Medtox Scientific
- Comprehensive toxicology company specialising in workplace, on-site, biological, and therapeutic testing.
- Omega Labs
- Services include hair analysis for drug testing.
- Pacific Toxicology Laboratories
- Offering biological monitoring, drug testing, and medical surveillance.
- PharmChem
- Independent laboratory providing integrated drug testing services to corporate and governmental clients.
- Psychemedics Corporation
- Drug testing company using hair samples for detecting drugs of abuse.
- Sciteck
- Reference laboratory offering nationwide drug testing services. Diagnostic division manufactures clinical chemistry and point of care products.
 Tricho-Tech Ltd
- Offers a confidential drug screening service using hair analysis.
|
